Yes, I know Phantom has 14 there now, which would never fly here, but their crew numbers are also smaller and flexible across the pond.
What do you mean "it would never fly here?" We will absolutely be seeing that production here before long. Just like the reduced Les Miz revival and the reduced Cats revival. And we'll complain about it, and yet it will still run. Probably with more expensive ticket prices. THAT is show biz.